Method for recuperating vent gas coming from an ozonization...

B - Operations – Transporting – 01 – D

Patent

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Details

B01D 53/66 (2006.01) B01D 53/84 (2006.01) C02F 1/78 (2006.01) C02F 3/02 (2006.01)

Patent

CA 2277785

The invention concerns a method for recuperating vent gas coming from an ozonization reactor, in a plant treating effluents in particular of waste water comprising in the following order or otherwise, a biological reactor (10), a clarification tank (12) and an ozonization reactor (14), characterised in that: the vent gas coming from the ozonization reactor is contacted, countercurrent, with a flow of water containing compounds oxidizable by the ozone for efficiently consuming and eliminating the residual ozone; the vent gas free from residual ozone is then, optionally, scoured using the water taken from the clarification tank, for producing a gas/liquid mixture; said gas/liquid mixture is transformed into an emulsion of very fine bubbles; and said emulsion is introduced in the biological reactor in the proximity of the latter.

Procédé de récupération et de réutilisation du gaz d'évent provenant d'un réacteur d'ozonation, dans une installation de traitement d'effluents notamment d'eaux usées comprenant, dans cet ordre ou dans un autre, un réacteur biologique (10), un clarificateur (12) et un réacteur d'ozonation (14) caractérisé en ce que: le gaz d'évent provenant du réacteur d'ozonation est mis au contact, à contre-courant, d'un flux d'eau contenant des composés oxydables par l'ozone, afin de consommer efficacement et d'éliminer l'ozone résiduel; le gaz d'évent débarrassé de l'ozone résiduel est ensuite, éventuellement, surpressé en utilisant de l'eau prélevée dans le clarificateur, afin de produire un mélange gaz/liquide; ledit mélange gaz liquide est transformé en une émulsion de très fines bulles et; ladite émulsion est introduite dans le réacteur biologique au voisinage du fond de ce dernier.

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